Post process 'xor', 'or' and 'cmp' instructions and select better encoding, if available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148485 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/MC/X86/intel-syntax-encoding.s b/test/MC/X86/intel-syntax-encoding.s
new file mode 100644
index 0000000..0d1b2fa
--- /dev/null
+++ b/test/MC/X86/intel-syntax-encoding.s
@@ -0,0 +1,22 @@
+// RUN: llvm-mc -x86-asm-syntax=intel -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: encoding: [0x66,0x83,0xf0,0x0c]
+ xor ax, 12
+// CHECK: encoding: [0x83,0xf0,0x0c]
+ xor eax, 12
+// CHECK: encoding: [0x48,0x83,0xf0,0x0c]
+ xor rax, 12
+
+// CHECK: encoding: [0x66,0x83,0xc8,0x0c]
+ or ax, 12
+// CHECK: encoding: [0x83,0xc8,0x0c]
+ or eax, 12
+// CHECK: encoding: [0x48,0x83,0xc8,0x0c]
+ or rax, 12
+
+// CHECK: encoding: [0x66,0x83,0xf8,0x0c]
+ cmp ax, 12
+// CHECK: encoding: [0x83,0xf8,0x0c]
+ cmp eax, 12
+// CHECK: encoding: [0x48,0x83,0xf8,0x0c]
+ cmp rax, 12